Rainbow-electronics AT83C26 Manual de usuario descargar pdf (Pagina 14)

7511B–SCR–10/05

AT83C26

Figure 4. Clock Block Diagram with Software Activation

CRST controller

CRSTn for SCn interface (n=1, 2)

The CRSTn output pin is driven by the CARDRSTn bit value or by A1/RST pin.

Three modes are available:

• If the ARTn bit is reset, CRSTn pin is driven by CARDRSTn bit.

• If the ARTn bit is set, CRSTn pin is controlled and follows the “Automatic Reset Transition”

(see Activation sequence page 25).

• A transparent mode with A1/RST pin.

Figure 5. CRSTn Block Diagram

DCK[2:0]

CKSn[2:0]

CLK

A2/CK

CCLKn

DC/DCA

CKSTOPn bit

CARDCKn bit

Internal

oscillators

and B

DCCLK

CRSTn

ARTn bit

CARDRSTn bit

tb delay

A1/RST

CRST_SELn bit

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 76 77

Features 1
Description 1
Acronyms 2
Block Diagram 2
Pin Description 3
Table 1. Ports Description 4
Pad Type Description 7
Slew control 8
CIOn_SLEW_CTRL bits 8
INT_PULLUP bit 9
Operational Modes 10
TWI Commands 10
7511B–SCR–10/05 11
RESET pin 12
BYPASS pin 12
Smart Card Interfaces 12
Clock Controller 13
DCDC Converters 13
CRST controller 14
CIO, CC4, CC8 controller 15
Card Presence Detection 19
DC/DC converters 20
Warm reset (n=1, 2, 3, 4, 5) 26
Transparent mode 29
Interrupts 30
Slew rate control 32
Power down mode 32
Write Commands 33
Read Command 35
Registers summary 36
Table 15. DC/DC B registers 37
Registers 38
Reset value = 0x X000 1010 39
Reset value = 0x 0001 X000 40
Reset value = 0x XXX0 XXXX 41
Reset value = 0x X000 0000 42
Reset value = 0x 0110 0000 43
Reset value = 0x 0000 X000 45
Table 24. SC2_CFG0 () 45
Reset value = 0x XX10 1010 46
Table 25. SC2_CFG1 () 46
Reset value = 0x00001000 47
Table 26. SC2_CFG2 () 47
Reset value = 0x 000X 0000 48
Table 27. SC3_CFG0() 48
Reset value = 0x 0X00 1000 49
Table 28. SC3_CFG2 () 49
Reset value = 0x 000X X000 50
Table 29. SC4_CFG0() 50
Table 30. SC4_CFG2 () 51
Table 31. SC5_CFG0() 52
Table 32. SC5_CFG2 () 53
Reset value = 0x XXXX 1000 55
Table 38. IO Selection 55
AUX2 to CRST3/CC82 pin 56
Table 39. INTERFACEB () 57
Reset value = 0x 1111 0010 59
Table 41. ITDIS () 59
Reset value = 0x 0000 0000 60
Reset value = 0x 0000 1111 61
Table 43. LDO 61
Reset value = 0x 1111 1111 62
Reset value = 0x XXXX 1111 64
Electrical Characteristics 65
Load = 35mA 67
Load = 60mA 67
Load = 30mA 68
Load = 15mA 69
Table 62. DCDCB 71
Typical Application 73
Ordering 74
Information 74
Package Drawings 75
Regional Headquarters 77

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Rainbow-electronics AT83C26 Manual de usuario Pagina 14

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